Flexible flat cable assembly detection circuit and method thereof, and flexible flat cable

Abstract

The invention discloses a flexible flat cable assembly detection circuit and method and a flexible flat cable. The flexible flat cable is provided with a detection contact and a plurality of contacts, and the flexible flat cable seat is provided with a plurality of connection points. When the flexible flat cable and the flexible flat cable seat are in an abnormal assembly state, the detection contacts are respectively connected with two connection points in the flexible flat cable seat; the flexible flat cable assembly detection circuit comprises a pull-up circuit, a pull-down circuit and a detection circuit, when the flexible flat cable and the flexible flat cable base are in an abnormal assembly state, one of two connection points electrically connected with the detection contacts is electrically connected with the first end of the pull-up circuit, and the other connection point is electrically connected with the first end of the pull-down circuit; the detection end of the detection circuit is electrically connected with the first end of the pull-up circuit or the first end of the pull-down circuit. The purpose of the invention is to improve the convenience of flexible flat cable assembly state detection.

Description

Technical Field

[0001] The present application relates to the technical field of flexible cable assembly detection, and in particular to a flexible cable assembly detection circuit and method, and a flexible cable. Background Art

[0002] For a flexible cable, that is, a Flexible Printed Circuit Board, during the assembly process, it is often necessary to manually insert the flexible cable into the flexible cable socket for assembly, so that the gold finger contacts on the flexible cable are in contact with the connection points in the flexible cable socket to establish an electrical connection. However, for whether the gold finger contacts are assembled in place, it can only be judged by recognizing the area of the exposed gold finger contacts through image recognition at present, which is only applicable to the case of a flexible cable socket and a camera module for image acquisition on the production line, and is very inconvenient. Summary of the Invention

[0003] The main purpose of the present application is to provide a flexible cable assembly detection circuit and method, and a flexible cable, aiming to improve the convenience of detecting the assembly state of the flexible cable.

[0004] To achieve the above object, the present application provides a flexible cable assembly detection circuit. Detection contacts and a plurality of contacts are provided on the flexible cable, and the flexible cable socket has a plurality of connection points; when the flexible cable and the flexible cable socket are in a normal assembly state, the plurality of contacts are respectively connected to the plurality of connection points one by one, and the detection contacts are in a suspended state; when the flexible cable and the flexible cable socket are in an abnormal assembly state, the detection contacts are respectively connected to two of the connection points in the flexible cable socket.

[0005] The flexible cable assembly detection circuit includes:

[0006] A pull-up circuit and a pull-down circuit. When the flexible cable and the flexible cable socket are in an abnormal assembly state, one of the two connection points respectively electrically connected to the detection contacts is electrically connected to the first end of the pull-up circuit, and the other is electrically connected to the first end of the pull-down circuit; the second end of the pull-up circuit is used to access a first voltage, and the second end of the pull-down circuit is grounded.

[0007] When the flexible cable and the flexible cable socket are in an abnormal assembly state, the pull-up circuit establishes an electrical connection path with the pull-down circuit through the detection contacts to form a voltage division circuit, and divides the first voltage according to a preset voltage division ratio and outputs it.

[0008] A detection circuit, the detection end of the detection circuit is electrically connected to the first end of the pull-up circuit or the first end of the pull-down circuit.

[0009] The detection circuit is configured to determine the assembly state of the flexible cable and the flexible cable socket according to the voltage at the detection end.

[0010] Optionally, the pull-up circuit includes a first resistor, and the pull-down circuit includes a second resistor; the second end of the first resistor is configured to be connected to the first voltage, and the second end of the second resistor is grounded; the first end of the pull-up circuit includes the first end of the first resistor, and the first end of the pull-down circuit includes the first end of the second resistor.

[0011] Optionally, the detection circuit includes:

[0012] An analog-to-digital conversion circuit, the first end of the analog-to-digital conversion circuit is electrically connected to the first end of the pull-up circuit or the first end of the pull-down circuit; the analog-to-digital conversion circuit is configured to perform analog-to-digital conversion on the voltage at the first end of the analog-to-digital conversion circuit and output a first signal through its second end;

[0013] A control circuit, configured to determine the assembly state of the flexible cable and the flexible cable socket according to the first signal.

[0014] Optionally, the first end of the analog-to-digital conversion circuit is connected to the first end of the pull-up circuit; the control circuit is configured to determine that the flexible cable and the flexible cable socket are in an abnormal assembly state after the voltage at the first end of the analog-to-digital conversion circuit drops from the first voltage according to a preset voltage division ratio.

[0015] Optionally, the flexible cable assembly detection circuit further includes:

[0016] A voltage conversion circuit, the input end of the voltage conversion circuit is connected to the power supply end, and the output end of the voltage conversion circuit is connected to the second end of the pull-up circuit; the voltage conversion circuit is configured to access the power supply voltage, perform voltage conversion on the power supply voltage, and output it as the first voltage.

[0017] Optionally, the flexible cable assembly detection circuit further includes: a prompting component, the prompting component is electrically connected to the detection circuit;

[0018] The detection circuit is further configured to control the prompting component to operate when it is determined that the flexible cable and the flexible cable socket are in an abnormal assembly state.

[0019] The present application also provides a flexible cable, the flexible cable includes:

[0020] The flexible cable body has a first end and a second end arranged along the length direction. A plurality of connection contacts are arranged side by side along the width direction on the first end of the flexible cable body. The plurality of connection contacts are used to establish electrical connection paths in one-to-one correspondence with connection points in a plurality of flexible cable seats when the flexible cable and the flexible cable seat are in a normal assembly state.

[0021] A detection contact is arranged on the flexible cable body. The detection contact is arranged on opposite sides in the distribution direction of the plurality of connection contacts, and both ends of the detection contact are respectively arranged corresponding to two connection contacts.

[0022] Wherein, the detection contact is used to respectively establish electrical connections with two connection points corresponding to two connection contacts at both ends of the detection contact in the flexible cable seat when the flexible cable and the flexible cable seat are in an abnormal assembly state, so as to establish an electrical connection path between the two connection points. It is also used to be in a suspended state when the flexible cable and the flexible cable seat are in a normal assembly state.

[0023] Optionally, the number of the detection contacts is multiple.

[0024] Wherein, the multiple detection contacts are arranged in sequence along the length direction.

[0025] And / or,

[0026] The multiple detection contacts are arranged in sequence along the width direction.

[0027] And / or,

[0028] At least two detection contacts are respectively arranged on opposite side edges in the distribution direction of the connection contacts.

[0029] Optionally, both ends of the detection contact are respectively arranged corresponding to two adjacent connection contacts.

[0030] The present application also proposes a method for detecting the assembly of a flexible cable. Based on the flexible cable assembly detection circuit as described in any one of the above and the flexible cable as described in any one of the above, the method includes:

[0031] Obtain the voltage information at the detection end of the detection circuit.

[0032] Determine the assembly state of the flexible cable and the flexible cable seat according to the voltage information.

[0033] The flexible cable assembly detection circuit of the present application includes a pull-up circuit, a pull-down circuit, and a detection circuit. Among them, when the flexible cable and the flexible cable socket are in an abnormal assembly state, the pull-up circuit establishes an electrical connection path with the pull-down circuit through a detection contact to form a voltage division circuit, and outputs the first voltage after voltage division according to a preset voltage division ratio. The detection circuit is used to determine the assembly state of the flexible cable and the flexible cable socket according to the voltage at the detection end. In this way, the flexible cable assembly detection circuit of the present application can identify the current assembly state of the flexible cable when the assembly personnel assemble the flexible cable into the flexible cable socket. Compared with the existing image recognition scheme, the circuit structure is simple and the cost is low, and there is no special requirement for the setting scenario, effectively improving the convenience of flexible cable assembly detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0035] Figure 1 Schematic diagram of the circuit module of an embodiment of the flexible cable assembly detection circuit of the present application;

[0036] Figure 2 Specific circuit schematic diagram of an embodiment of the flexible cable assembly detection circuit of the present application;

[0037] Figure 3 Schematic diagram of the circuit module of another embodiment of the flexible cable assembly detection circuit of the present application;

[0038] Figure 4 Schematic diagram of the circuit module of an embodiment of the flexible cable assembly detection circuit of the present application when the flexible cable and the flexible cable socket are in an abnormal assembly state;

[0039] Figure 5 Schematic diagram of the circuit module of an embodiment of the flexible cable assembly detection circuit of the present application when the flexible cable and the flexible cable socket are in a normal assembly state.

[0040] Figure 6 Schematic diagram of the structure of an embodiment of the flexible cable of the present application;

[0041] Figure 7 Schematic diagram of the structure of another embodiment of the flexible cable of the present application;

[0042] Figure 8 Schematic diagram of the structure of yet another embodiment of the flexible cable of the present application;

[0043] Figure 9 Schematic diagram of the structure of another embodiment of the flexible cable of the present application;

[0044] Figure 10 Schematic diagram of the structure of yet another embodiment of the flexible cable of the present application;

[0045] Figure 11 Schematic flowchart of an embodiment of the assembly detection method for the flexible cable of the present application;

[0046] Figure 12 Schematic diagram of the structure in the case where the flexible cable and the flexible cable socket are in a normal assembly state in the prior art;

[0047] Figure 13 Another schematic diagram of the structure in the case where the flexible cable and the flexible cable socket are in a normal assembly state in the prior art.

[0048] Explanation of the reference numerals in the drawings:

[0049]

[0050]

[0051] The realization of the purpose of the present application, functional features and advantages will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0052] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts shall fall within the protection scope of the present application.

[0053] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0054] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement it. When the combination of technical solutions conflicts with each other or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0055] For a flexible flat cable, that is, a Flexible Printed Circuit Board, during the assembly process, it is often necessary to manually insert the flexible flat cable into the flexible flat cable socket for assembly so that the gold finger contacts on the flexible flat cable contact the connection points in the flexible flat cable socket to establish an electrical connection. However, for whether the gold finger contacts are assembled in place, currently it can only be judged by recognizing the exposed area of the gold finger contacts through images, which is only applicable to the case of the flexible flat cable socket and the camera module for image acquisition on the production line, and it is very inconvenient.

[0056] It can be understood that referring to Figure 12 and Figure 13 , during the assembly of the flexible flat cable, especially when assembling it into the flexible flat cable socket with a ZIP structure (the flexible flat cable socket with a ZIP structure requires the assembler to manually open the top cover of the flexible flat cable socket, align the connection points in the flexible flat cable socket, place the flexible flat cable in it, and close the top cover to press the flexible flat cable to fix the flexible flat cable and the flexible flat cable socket), due to manual assembly, after closing the top cover, the flexible flat cable and the flexible flat cable socket may be in an abnormal assembly state. Based on the different structures of the flexible flat cable socket and the assembler's techniques, there are various situations of abnormal assembly states. For example, referring to Figure 12 , Figure 12 , the flexible flat cable is not inserted in place, resulting in the connection contacts on the flexible flat cable not contacting the connection points on the flexible flat cable socket, or referring to Figure 13 , Figure 13 , the flexible flat cable is inserted too much, which also causes the connection contacts on the flexible flat cable not to contact the connection points on the flexible flat cable socket. The above abnormal assembly states will cause the flexible flat cable socket and the flexible flat cable to be fixed together but actually no electrical connection path is established between the two.

[0057] To this end, the present application proposes a flexible cable assembly detection circuit 30. Detection contacts 220 and a plurality of contacts are provided on the flexible cable, and the flexible cable socket 100 has a plurality of connection points 110. When the flexible cable and the flexible cable socket 100 are in a normal assembly state, the plurality of contacts are respectively connected to the plurality of connection points 110 one by one, and the detection contact 220 is in a suspended state. When the flexible cable and the flexible cable socket 100 are in an abnormal assembly state, the detection contact 220 is respectively connected to two of the connection points 110 in the flexible cable socket 100.

[0058] Reference Figure 1 , in an embodiment of the present application, the flexible cable assembly detection circuit 30 includes:

[0059] A pull-up circuit 10 and a pull-down circuit 20. When the flexible cable and the flexible cable socket 100 are in an abnormal assembly state, one of the two connection points 110 respectively electrically connected to the detection contact 220 is electrically connected to the first end of the pull-up circuit 10, and the other is electrically connected to the first end of the pull-down circuit 20. The second end of the pull-up circuit 10 is used to access a first voltage, and the second end of the pull-down circuit 20 is grounded.

[0060] When the flexible cable and the flexible cable socket 100 are in an abnormal assembly state, the pull-up circuit 10 establishes an electrical connection path with the pull-down circuit 20 through the detection contact 220 to form a voltage dividing circuit, and divides the first voltage according to a preset voltage division ratio and outputs it.

[0061] A detection circuit 30, the detection end of the detection circuit 30 is electrically connected to the first end of the pull-up circuit 10 or the first end of the pull-down circuit 20.

[0062] The detection circuit 30 is used to determine the assembly state of the flexible cable and the flexible cable socket 100 according to the voltage at the detection end.

[0063] In this embodiment, optionally, the first voltage can be directly provided by an external power source, such as a battery, an energy storage device, etc. Optionally, both the pull-up circuit 10 and the pull-down circuit 20 can be implemented by using at least one resistor. For example, as shown in Figure 2 , the pull-up circuit 10 includes a first resistor R1, and the pull-down circuit 20 includes a second resistor R2. The second end of the first resistor R1 is used to access the first voltage, and the second end of the second resistor R2 is grounded. The first end of the pull-up circuit 10 includes the first end of the first resistor R1, and the first end of the pull-down circuit 20 includes the first end of the second resistor R2.

[0064] When the first ends of the pull-up circuit 10 and the pull-down circuit 20 are connected together through the detection contact 220 to form a voltage dividing circuit, the voltage dividing circuit will divide the first voltage V1 according to a preset voltage division ratio and output it. The preset ratio is determined by the ratio of the first resistance value to the second resistance value. Optionally, the first resistance value includes the resistance value of the pull-up circuit 10. For example, Figure 2 the resistance value of the first resistor R1 in Figure 2 , the second resistance value is the sum of the resistance value of the pull-down circuit 20 and the resistance value of the detection contact 220. Or, when the resistance value of the detection contact 220 is relatively small, for example, the length of the detection contact 220 on the flexible cable main body is short, the copper foil thickness is thick, and the immersion gold process is used, then the resistance value of the detection contact 220 approaches zero, and the second resistance value is the resistance value of the pull-down circuit 20. For example, Figure 2 the resistance value of the second resistor R2 in Figure 2 . Optionally, the first resistance value includes the sum of the resistance value of the pull-up circuit 10 and the resistance value of the detection contact 220. Or, when the resistance value of the detection contact 220 is relatively small, for example, the length of the detection contact 220 on the flexible cable main body is short, the copper foil thickness is thick, and the immersion gold process is used, then the resistance value of the detection contact 220 approaches zero, and the first resistance value is the resistance value of the pull-up circuit 10. For example,

[0065] Refer to Figure 4 and Figure 5 It can be known that when the flexible cable and the flexible cable socket 100 are in a normal assembly state, the detection contact 220 is in a suspended state. Therefore, the voltage at the detection end of the detection circuit 30 is the voltage at the first end of the pull-up circuit 10 or the voltage at the first end of the pull-down circuit 20 to which it is connected. When the flexible cable and the flexible cable socket 100 are in a normal assembly state, since one of the two connection points 110 respectively electrically connected to the detection contact 220 is electrically connected to the first end of the pull-up circuit 10 and the other is electrically connected to the first end of the pull-down circuit 20 when the flexible cable and the flexible cable socket 100 are in an abnormal assembly state, the pull-up circuit 10 will establish an electrical connection path with the pull-down circuit 20 through the connection point 110 connected to it, the detection contact 220, and the connection point 110 connected to the pull-down circuit 20 to form a voltage dividing circuit. At this time, the voltage at the detection end of the detection circuit 30 will change because the pull-up circuit 10 and the pull-down circuit 20 form a voltage dividing circuit. In other words, the voltage at the detection end of the detection circuit 30 is different when the flexible cable and the flexible cable socket 100 are in a normal assembly or an abnormal assembly state. Therefore, the detection circuit 30 can determine the assembly state of the current flexible cable and the flexible cable socket 100 according to the voltage condition at the detection end.

[0066] Optionally, in one embodiment, the detection circuit 30 can determine the assembly state of the current flexible cable and the flexible cable socket 100 by detecting the specific voltage value at the detection end. For example, in one example, the detection circuit 30 includes:

[0067] An analog-to-digital conversion circuit, the first end of the analog-to-digital conversion circuit is electrically connected to the first end of the pull-up circuit 10 or the first end of the pull-down circuit 20; the analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the voltage at the first end of the analog-to-digital conversion circuit and output a first signal through its second end;

[0068] A control circuit for determining the assembly state of the flexible cable and the flexible cable socket 100 according to the first signal.

[0069] In this embodiment, the analog-to-digital conversion circuit can be implemented by an analog-to-digital conversion chip, or the analog-to-digital conversion circuit and the control circuit are integrated in the same chip, and the integrated chip has an analog-to-digital conversion port. The control circuit can be implemented by a main controller, such as an MCU, a DSP (Digital Signal Process, digital signal processing chip), an FPGA (Field Programmable Gate Array, programmable logic gate array chip), a PLC, an SOC (System On Chip, system-level chip), etc. The control circuit can determine the voltage at the first end of the analog-to-digital conversion circuit, that is, the detection end of the detection circuit 30, based on the first signal. For example, referring to Figures 1-5 , the first end of the analog-to-digital conversion circuit is connected to the first end of the pull-up circuit 10; the control circuit is used to determine that the flexible cable and the flexible cable socket 100 are in an abnormal assembly state after determining that the voltage at the first end of the analog-to-digital conversion circuit drops from the first voltage according to a preset voltage division ratio. Among them, referring to Figure 4 and Figure 5, and as can be seen from the above embodiments, when the flexible cable and the flexible cable socket 100 are in an abnormal assembly state, the pull-up circuit 10 and the pull-down circuit 20 form a voltage dividing circuit. When the first end of the analog-to-digital conversion circuit is connected to the first end of the pull-up circuit 10, the voltage dividing circuit will divide the first voltage according to a preset voltage division ratio formed by the resistance value of the pull-up circuit 10 and the resistance value of the pull-down circuit 20 (or the sum of the resistance values of the detection contact 220 and the pull-down circuit 20), and then output it through the first end of the pull-up circuit 10. Therefore, when the assembler inserts the flexible cable into the flexible cable socket 100, if the control circuit detects that the voltage at the first end of the current analog-to-digital conversion circuit is still the first voltage, it indicates that the detection contact 220 is floating, and then it is determined that the flexible cable and the flexible cable socket 100 are in a normal assembly state. If it is detected that the voltage at the first end of the current analog-to-digital conversion circuit drops from the first voltage according to the preset voltage division ratio, it is determined that the flexible cable and the flexible cable socket 100 are in an abnormal assembly state.

[0070] Optionally, in another embodiment, as can be seen from the above, for the flexible cable and the flexible cable socket 100 in an abnormal assembly state or a normal assembly state, the voltage at the detection end of the detection circuit 30 is different. Therefore, the detection circuit 30 can also be a hardware detection circuit 30. For example, the detection circuit 30 is implemented by using a light-emitting component, a sound-emitting component, or a vibration component. Taking the connection between the detection end of the detection circuit 30 and the first end of the pull-up circuit 10 as an example, the R & D personnel can select a light-emitting component with a working voltage of at least the first voltage V1, and the power supply end of the light-emitting component is connected to the first end of the pull-up circuit 10. In this way, when the flexible cable and the flexible cable socket 100 are in an abnormal assembly state, due to voltage division, the voltage received by the power supply end of the light-emitting component will be less than the working voltage, and the light-emitting component will change from the lit state to the extinguished state.

[0071] Optionally, the flexible cable assembly detection circuit 30 of the present application can be independently arranged on a detection board and electrically connected to the flexible cable socket 100 through a connector, or directly arranged on the circuit board where the flexible cable socket 100 is located.

[0072] In summary, the flexible cable assembly detection circuit 30 of the present application includes a pull-up circuit 10, a pull-down circuit 20, and a detection circuit 30. Among them, when the flexible cable and the flexible cable socket 100 are in an abnormal assembly state, the pull-up circuit 10 establishes an electrical connection path with the pull-down circuit 20 through the detection contact 220 to form a voltage division circuit, and divides the first voltage according to a preset voltage division ratio and then outputs it. The detection circuit 30 is used to determine the assembly state of the flexible cable and the flexible cable socket 100 according to the voltage at the detection end. In this way, the flexible cable assembly detection circuit 30 of the present application can identify the current assembly state of the flexible cable when the assembly personnel assemble the flexible cable into the flexible cable socket 100. Compared with the existing image recognition scheme, the circuit structure is simple and the cost is low, and there is no special requirement for the setting scene, effectively improving the convenience of flexible cable assembly detection.

[0073] Reference Figure 5 , in an embodiment of the present application, the flexible cable assembly detection circuit 30 further includes:

[0074] A voltage conversion circuit 40, the input end of the voltage conversion circuit 40 is connected to the power supply end, and the output end of the voltage conversion circuit 40 is connected to the second end of the pull-up circuit 10; the voltage conversion circuit 40 is used to access the power supply voltage, convert the power supply voltage, and output it as the first voltage.

[0075] In this embodiment, the voltage conversion circuit 40 can be implemented by a BOOST circuit or a BUCK circuit built with a switching tube, a capacitor, a resistor, and an inductor, or implemented by a voltage conversion chip and its peripheral circuit, such as an LDO chip and its peripheral circuit, a buck-boost chip and its peripheral circuit. It can be understood that at the assembly production line site, the voltage of the external power supply provided may be too high or difficult to adapt to the detection circuit 30. For example, the voltage is too large and exceeds the withstand voltage of the detection end. Therefore, the present application sets the voltage conversion circuit 40 to convert the power supply voltage provided by the assembly production line into a suitable first voltage and then output it to adapt to the normal operation of the flexible cable assembly detection circuit 30 of the present application.

[0076] Reference Figure 5 , in an embodiment of the present application, the flexible cable assembly detection circuit 30 further includes: a prompting component 50, the prompting component 50 is electrically connected to the detection circuit 30;

[0077] The detection circuit 30 is further used to control the prompting component 50 to work when it is determined that the flexible cable and the flexible cable socket 100 are in an abnormal assembly state.

[0078] In this embodiment, the prompting component 50 can be implemented by a light-emitting component, a sound-emitting component, a vibration component, a display component, etc. The detection circuit 30 can prompt the current user's assembly status by controlling the operation of the prompting component 50. For example, the detection circuit 30 is implemented by the above-mentioned analog-to-digital conversion circuit and control circuit, and the prompting component 50 is a light-emitting component. When the control circuit detects through the above-mentioned embodiment process that the current assembler is in the process of assembling the flexible cable and has completely assembled it into the flexible cable socket 100, it can control the light-emitting component to switch from the extinguished state to the light-emitting state to prompt the assembler, effectively improving the convenience of the assembler's assembly.

[0079] Reference Figure 6 , this application also proposes a flexible cable, and the flexible cable includes:

[0080] A flexible cable body 200, having a first end and a second end arranged along the length direction, and a plurality of connection contacts 210 are arranged side by side along the width direction on the first end of the flexible cable body 200; the plurality of connection contacts 210 are used to establish electrical connection paths in one-to-one correspondence with the connection points 110 in the plurality of flexible cable sockets 100 when the flexible cable and the flexible cable socket 100 are in a normal assembly state;

[0081] A detection contact 220, the detection contact 220 is arranged on the flexible cable body 200, the detection contact 220 is arranged on the relative two sides in the distribution direction of the plurality of connection contacts 210, and the two ends of the detection contact 220 are respectively arranged corresponding to two connection contacts 210;

[0082] Wherein, the detection contact 220 is used to electrically connect with the two connection points 110 corresponding to the two connection contacts 210 corresponding to the two ends of the detection contact 220 in the flexible cable socket 100 respectively when the flexible cable and the flexible cable socket 100 are in an abnormal assembly state, so as to establish an electrical connection path between the two connection points 110; it is also used to be in a suspended state when the flexible cable and the flexible cable socket 100 are in a normal assembly state.

[0083] In this embodiment, optionally, both the connection contacts 210 and the detection contacts 220 on the flexible cable body 200 can be implemented by solder pads, immersion solder pads, gold fingers, etc. The shape of the detection contact 220 can be rectangular, U-shaped, wavy, etc. For example, reference Figures 1-11 , the two ends of the detection contact 220 are arranged as rectangles along the width direction.

[0084] Optionally, the connection contacts 210 corresponding to both ends of the detection contact 220 may be adjacent connection contacts 210 or non - adjacent detection contacts 220. When the connection contacts 210 corresponding to both ends of the detection contact 220 are two adjacent connection contacts 210, the material used for the detection contact 220 can be minimized, thereby reducing the production cost and complexity of the flexible cable.

[0085] Reference Figure 5 , when the flexible cable and the flexible cable socket 100 are in a normal assembly state, the multiple connection contacts 210 are in one - to - one contact with the connection points 110 in the multiple flexible cable sockets 100 to establish an electrical connection path. At this time, the detection contact 220 is in a floating state, and there will be no electrical connection path established between two connection points 110 through the detection contact 220. Reference Figure 4 , when the flexible cable and the flexible cable socket 100 are in an abnormal assembly state, the detection contact 220 will contact two connection points 110 in the flexible cable socket 100 corresponding to the connection contacts 210 at its two ends and cause these two connection points 110 to establish an electrical connection path through the detection contact 220. In this way, during the actual assembly process by the assembler, as long as it is detected whether an electrical connection path is established between the two connection points 110 corresponding to the connection contacts 210 at both ends of the detection contact 220 in the flexible cable socket 100, it can be confirmed whether the current flexible cable is normally assembled with the flexible cable socket 100. For example, if one of the two connection points 110 is connected to the pull - up circuit 10 and the other is connected to the pull - down circuit 20, and the voltage of any one of the connection points 110 is detected, if the assembly is normal, then since there is no electrical connection path established between the two connection points 110, the voltage of any one of the detected connection points 110 will basically not change. If the assembly is abnormal, for example, Figure 4 not assembled in place as shown in, then the detection contact 220 on one side of the multiple contacts will establish an electrical connection path between the two connection points 110. At this time, the voltage of any one of the previously detected connection points 110 will inevitably change due to the voltage - dividing circuit composed of the pull - up circuit 10 and the pull - down circuit 20. At this time, it can be confirmed that the flexible cable and the flexible cable socket 100 are abnormally assembled.

[0086] Optionally, the flexible cable has a first side 230 and a second side 240 oppositely arranged along the length direction. The number of detection contacts 220 can be set to one, and one detection contact 220 is adapted according to the actual structure of the flexible cable socket 100. For example, when the assembler assembles the flexible cable, the situation where the flexible cable is not fully assembled mainly occurs, such as Figure 12 the assembly situation shown. Then the position of the detection contact 220 is set at the position between the multiple contacts and the first side 230, such as Figure 6 shown. Similarly, reference Figure 13, when the current assembly base may cause an abnormal assembly situation where the flexible printed circuit is inserted too deeply during assembly, the detection contact 220 can be as Figure 7 shown, and is arranged in the space between multiple contacts and the second side 240, so that when the flexible printed circuit is inserted too much, the detection contact 220 will be connected to the corresponding two connection points 110.

[0087] Optionally, in order to improve the detection accuracy and stability, the number of detection contacts 220 can also be multiple. In one example, referring to Figure 8 , multiple detection contacts 220 are arranged in sequence along the length direction. In this way, during the process of detecting whether the flexible printed circuit and the flexible printed circuit socket 100 are in abnormal assembly, the multiple detection contacts 220 arranged along the length direction can always make at least one detection contact 220 be able to contact and establish an electrical connection path with the corresponding two connection points 110 respectively in different lengths of the flexible printed circuit assembled into the flexible printed circuit socket 100 (both are abnormal assemblies) by the assembler, thus effectively improving the detection accuracy. At this time, it only needs to detect whether there is an electrical connection path between the corresponding two connection points 110 in the flexible printed circuit socket 100.

[0088] In another example, referring to Figure 9 , multiple detection contacts 220 can also be arranged along the width direction, and both ends of each detection contact 220 respectively correspond to two connection contacts 210. With such a setting, in actual situations, if the assembler does not align the flexible printed circuit and the flexible printed circuit socket 100 but forms a certain angle when assembling the flexible printed circuit into the flexible printed circuit socket 100, then the multiple detection contacts 220 arranged along the width direction can try to ensure that at least one detection contact 220 can contact and establish an electrical connection path with the corresponding two connection points 110 in the flexible printed circuit socket 100 in the above abnormal assembly situation, thus effectively improving the detection accuracy. It can be understood that at this time, it is necessary to correspondingly detect the paths between the two connection points 110 corresponding to each detection contact 220.

[0089] In still another example, due to the influence of the structure of some flexible printed circuit sockets 100 and the design of the connection contacts 210 on the flexible printed circuit, during the assembly process by the assembler, there may be simultaneously Figure 12 or Figure 13 abnormal assembly situations. For this reason, referring to Figure 10 , at least two detection contacts 220 are respectively arranged on the opposite two side edges in the distribution direction of the connection contacts 210. In this way, whether the assembler inserts the flexible printed circuit into the flexible printed circuit socket 100 too much or the assembly is not in place, at least one detection contact 220 will also contact and establish an electrical connection path with the corresponding two connection points 110 in the flexible printed circuit socket 100, thus realizing the detection of the abnormal assembly of the flexible printed circuit.

[0090] Reference Figures 1-11 Moreover, the present application also provides a flexible cable assembly detection method, based on the flexible cable assembly detection circuit 30 described in any one of the above and the flexible cable described in any one of the above. The method includes:

[0091] Step S100: Obtain the voltage information of the detection end of the detection circuit 30;

[0092] Step S200: Determine the assembly state of the flexible cable and the flexible cable socket 100 according to the voltage information.

[0093] It should be noted that since the flexible cable assembly detection method of the present application is based on the above flexible cable assembly detection circuit 30 and the flexible cable. Therefore, the flexible cable assembly detection method of the present application also has all the technical effects brought by different technical solutions in the flexible cable assembly detection circuit 30 and the flexible cable, which will not be elaborated here one by one.

[0094] In this embodiment, as can be seen from the content of the above embodiment, when the flexible cable and the flexible cable socket 100 are in a normal assembly state, the detection contact 220 is in a suspended state. Therefore, the voltage at the detection end of the detection circuit 30 is the voltage at the first end of the pull-up circuit 10 or the voltage at the first end of the pull-down circuit 20 to which it is connected. When the flexible cable and the flexible cable socket 100 are in a normal assembly state, when the flexible cable and the flexible cable socket 100 are in an abnormal assembly state, one of the two connection points 110 respectively electrically connected to the detection contact 220 is electrically connected to the first end of the pull-up circuit 10, and the other is electrically connected to the first end of the pull-down circuit 20. Therefore, the pull-up circuit 10 will establish an electrical connection path with the pull-down circuit 20 through the connection point 110 connected to it, the detection contact 220, and the connection point 110 connected to the pull-down circuit 20 to form a voltage dividing circuit. At this time, the voltage at the detection end of the detection circuit 30 will change because the pull-up circuit 10 and the pull-down circuit 20 form a voltage dividing circuit. In other words, the voltage at the detection end of the detection circuit 30 is different when the flexible cable and the flexible cable socket 100 are in a normal or abnormal assembly state. Therefore, the assembly state of the flexible cable and the flexible cable socket 100 can be determined by obtaining the voltage information of the detection end of the detection circuit 30. For example, reference Figure 4 and Figure 5, taking the connection between the detection terminal of the detection circuit 30 and the first terminal of the pull-up circuit 10 as an example for illustration. The voltage dividing circuit divides the first voltage according to a preset voltage division ratio formed by the resistance value of the pull-up circuit 10 and the resistance value of the pull-down circuit 20 (or the sum of the resistance values of the detection contact 220 and the pull-down circuit 20), and then outputs it through the first terminal of the pull-up circuit 10. Therefore, when the assembly worker installs the flexible cable into the flexible cable socket 100, if it is determined based on the voltage information that the voltage at the detection terminal of the detection circuit 30 is still the first voltage, it indicates that the detection contact 220 is suspended, and then it is determined that the flexible cable and the flexible cable socket 100 are in a normal assembly state. If it is determined based on the voltage information that the voltage at the detection terminal of the detection circuit 30 drops from the first voltage according to the preset voltage division ratio, it is determined that the flexible cable and the flexible cable socket 100 are in an abnormal assembly state. In this way, the flexible cable assembly detection method of the present application can identify the current assembly state of the flexible cable when the assembly worker assembles the flexible cable into the flexible cable socket 100. Compared with the existing image recognition solution, the circuit structure is simple and the cost is low, and there is no special requirement for the setting scenario, effectively improving the convenience of flexible cable assembly detection.

[0095] The above are only exemplary embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural transformation made under the technical concept of the present application by using the content of the specification and drawings of the present application, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A flexible flat cable assembly detection circuit, characterized in that: The flexible flat cable is provided with a detection contact and a plurality of contacts, and the flexible flat cable holder has a plurality of connection points; when the flexible flat cable and the flexible flat cable holder are in a normal assembly state, the plurality of contacts are connected to the plurality of connection points in a one-to-one correspondence, and the detection contact is in a suspended state; when the flexible flat cable and the flexible flat cable holder are in an abnormal assembly state, the detection contact is respectively connected to two of the connection points in the flexible flat cable holder; The flexible flat cable assembly detection circuit comprises: A pull-up circuit and a pull-down circuit, wherein one of the two connection points electrically connected to the detection contacts when the flexible flat cable and the flexible flat cable holder are in an abnormal assembly state is electrically connected to the first end of the pull-up circuit, and the other is electrically connected to the first end of the pull-down circuit; the second end of the pull-up circuit is used to access a first voltage, and the second end of the pull-down circuit is grounded; When the flexible flat cable and the flexible flat cable holder are in an abnormal assembly state, the pull-up circuit establishes an electrical connection path with the pull-down circuit via the detection contact to form a voltage divider circuit, and outputs the first voltage after dividing it according to a preset voltage divider ratio; a detection circuit, wherein a detection end of the detection circuit is electrically connected to the first end of the pull-up circuit or the first end of the pull-down circuit; The detection circuit is used to determine the assembly state of the flexible flat cable and the flexible flat cable holder according to the voltage of the detection end.

2. The flexible flat cable assembly detection circuit according to claim 1, characterized in that: The pull-up circuit includes a first resistor, and the pull-down circuit includes a second resistor; the second end of the first resistor is used to connect to the first voltage, and the second end of the second resistor is grounded; the first end of the pull-up circuit includes the first end of the first resistor, and the first end of the pull-down circuit includes the first end of the second resistor.

3. The flexible flat cable assembly detection circuit according to claim 1, characterized in that: The detection circuit comprises: an analog-to-digital conversion circuit, wherein a first end of the analog-to-digital conversion circuit is electrically connected to a first end of the pull-up circuit or a first end of the pull-down circuit; the analog-to-digital conversion circuit is used to perform analog-to-digital conversion on a voltage at the first end of the analog-to-digital conversion circuit and then output a first signal via its second end; The control circuit is used to determine the assembly state of the flexible flat cable and the flexible flat cable holder according to the first signal.

4. The flexible flat cable assembly detection circuit according to claim 3, characterized in that: The first end of the analog-to-digital conversion circuit is connected to the first end of the pull-up circuit; the control circuit is used to determine, based on the first signal, that the voltage of the first end of the analog-to-digital conversion circuit drops from the first voltage according to a preset voltage division ratio, and determine that the flexible flat cable and the flexible flat cable holder are in an abnormal assembly state.

5. The flexible flat cable assembly detection circuit according to any one of claims 1 to 4, characterized in that: The flexible flat cable assembly detection circuit also includes: A voltage conversion circuit, wherein the input end of the voltage conversion circuit is connected to the power supply end, and the output end of the voltage conversion circuit is connected to the second end of the pull-up circuit; the voltage conversion circuit is used to access the power supply voltage and convert the power supply voltage into the first voltage before outputting it.

6. The flexible flat cable assembly detection circuit according to any one of claims 1 to 4, characterized in that: The flexible flat cable assembly detection circuit further includes: a prompt component, the prompt component is electrically connected to the detection circuit; The detection circuit is further used to control the operation of the prompt component when determining that the flexible flat cable and the flexible flat cable holder are in an abnormal assembly state.

7. A flexible flat cable, characterized in that: The flexible flat cable comprises: The flexible flat cable body has a first end and a second end arranged along the length direction, and a plurality of connection contacts are arranged side by side along the width direction on the first end of the flexible flat cable body; the plurality of connection contacts are used to establish electrical connection paths with a plurality of connection points in the flexible flat cable holder in a one-to-one correspondence when the flexible flat cable and the flexible flat cable holder are in a normal assembly state; Detection contacts, the detection contacts are arranged on the flexible flat cable body, the detection contacts are arranged on two opposite sides in the distribution direction of the plurality of connection contacts, and the two ends of the detection contacts are respectively arranged corresponding to the two connection contacts; Among them, the detection contact is used to electrically connect to the two connection points corresponding to the two connecting contacts at both ends of the detection contact in the soft cable holder when the soft cable and the soft cable holder are in an abnormal assembly state, so as to establish an electrical connection path between the two connection points; and is also used to be in a suspended state when the soft cable and the soft cable holder are in a normal assembly state.

8. The flexible flat cable according to claim 7, wherein: The number of the detection contacts is multiple; Wherein, a plurality of the detection contacts are arranged in sequence along the length direction; and / or, A plurality of detection contacts are arranged in sequence along the width direction; and / or, The at least two detection contacts are respectively arranged on two opposite sides in the distribution direction of the connection contacts.

9. The flexible flat cable according to any one of claims 7 to 8, characterized in that: The two ends of the detection contact are respectively arranged corresponding to two adjacent connection contacts.

10. A flexible flat cable assembly detection method, characterized in that: Based on the flexible flat cable assembly detection circuit according to any one of claims 1 to 6 and the flexible flat cable according to any one of claims 7 to 9, the method comprises: Acquiring voltage information of a detection end of the detection circuit; The assembly state of the flexible flat cable and the flexible flat cable holder is determined according to the voltage information.

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